#include<stdio.h>

int Sum(int x,int y)
{
  int sum = 0;
  for(int i = x;i < y;i++)
  {
    sum += i;
  }
  return sum;
}
int main()
{
  printf("def\n");
  int a = 0;
  int b = 100;
  int ret = Sum(a,b);
  printf(" sum:%d\n",ret);
  return 0;
}
